[mjk3888]

First off all credit for this mod goes to "NBR IPD" he posted a thread with the below pictures in the 1LE section. I figured it needed to be shared with all the other LT1 owners since it applies to all LT1 cars.

This is a super easy modification that takes 30 seconds, and can be reversed just as easily if you don't like the sound.

I'm a pretty picky guy and I found that the induction noise this amplifies is a huge improvement and honest to god makes the car sound like it has a CAI installed.

For those of you who have never put a CAI on a car please don't mistake induction noise as an air whooshing sound. The induction noise is the deep bellow/growl you hear on heavy throttle application. I would be shocked if this mod doesn't catch on and become bigger than the typical fuse pull mod.

Now to the good stuff. Below are the photos posted in the other thread that very clearly show where to open up the sound tube and remove the foam insert that dampens the induction noise. Squeeze the collar on the sided to help the tabs on the top and bottom disconnect. Once you open up the tube reach in with a small set of pliers or even a flat head screw driver and pull the foam damper out. After that simply snap the tube back together and go for a drive. If you still have your NPP fuse in you can actually put the car in stealth mode so you can then distinguish which noise is coming from the sound tube. Even without the car in stealth mode the sound difference is very noticeable and if you didn't know better you would think the exhaust had been modified.

Try it out and post back with your opinions.

[Redlinez]

Cool, gotta try that. I removed the whole thing from my 15 Mustang GT.

[Eric SS]

I assume that there is a diaphragm upstream from this that keeps the actual intake air separated from the air in the soundtube right? I think most are designed that way. I'd like to know that before I pull the only thing possibly separating the intake air from coming into the cabin instead of the engine.

[SuperSound]

mjk3888 didn't read too far down did you? lol


http://www.camaro6.com/forums/showthread.php?t=501482

[MAGAUSA]

Originally Posted by Eric SS

I assume that there is a diaphragm upstream from this that keeps the actual intake air separated from the air in the soundtube right? I think most are designed that way. I'd like to know that before I pull the only thing possibly separating the intake air from coming into the cabin instead of the engine.

Yes, the circular housing bolted to the block underneath the intake tube is where the diaphragm sits. There's no air passing from or to the cabin. My opinion is that the sound is artificial because this passive diaphragm vibrates from noise and vacuum pressure changes and produces its own sound that travels through the plastic tube and into our ears. But that's just my thoughts.

To your question, you could quickly take the diaphragm housing off and inspect for yourself if you disconnect the part with the foam. There are two torx that secure it to the block. I recall there are three plastic torx screws that open the diaphragm. Not good for contraceptive use. The more I think about this, diaphragms, foam, plastic tubing fit to run electrical wiring, a 1/2" hole in the firewall, the more ridiculous this entire thing gets.

[mjk3888]

Originally Posted by SuperSound

mjk3888 didn't read too far down did you? lol


http://www.camaro6.com/forums/showthread.php?t=501482

Sorry about that. I admit I'm not over in this section of the forums much. Mods feel free to delete this thread.

[SuperSound]

Originally Posted by mjk3888

Sorry about that. I admit I'm not over in this section of the forums much. Mods feel free to delete this thread.

You're good. Actually a mod should probably merge our threads and delete my original post since you posted the actual pics/instructions.

[SomeGeoffGuy]

Originally Posted by MAGAUSA

My opinion is that the sound is artificial because this passive diaphragm vibrates from noise and vacuum pressure changes and produces its own sound that travels through the plastic tube and into our ears.

I think it is artificially amplified by the diaphragm, but the pulses are real. The system is passively amplifying the pulses and sending them directly to the engine compartment. I think the foam just softens it a little. I can imagine it is pounding pretty good without the foam!

-Geoff

[JKLNHYD]

Unless you're at WOT, it sounds horrible when the AFM kicks in from V4 to V8. I put mine back in.

[SomeGeoffGuy]

Maybe try cutting the foam in half?

-Geoff

[Techn9cian805]

Hmm... This looks like a cool little mod... will try soon as I'm out of work and report. I am so glad that AFM wasn't activated on the M6, that would ruin my sound enjoyment so much

[Obzen]

Sounds bad on the auto. Right when it switches out of AFM It just makes a loud drone for like 200rpm or so and then sounds normal. It's very V8 sounding but it's got this weird kinda fake tone to it. Maybe it sounds cool on WOT but just cruising sounds terrible. I put mine back in.

[BowtieRocket]

Sounds good for the m6. Still have mine out

[Techn9cian805]

LOL I AM LOVING IT! I cant believe that little piece of shit foam makes such a difference! Thanks for the info! I wont lie, when i went WOT for the first time after removing it, it spooked me since i wasnt expecting that much of a change in sound. This plus putting the backseat down are by far the best little "mods" to add a little more rumble inside the cab, i love it!